Ryanair are an airline (or so I've been led to believe). An airline provides a service. The service is to fly the passenger from A to B with their luggage. If a Ryanair aircraft were to go technical in a frighteningly huge way due to a maintenance defect tomorrow, and there was proof that skimping to cut costs led to the failure, would anyone try to tell relatives of the dead that 'they got what they paid for' ? There are certain minimum standards of service, one of which is fulfilling your core competence.
I am not suggesting that Ryanair skimp on maintenance either. It is just my flippant example of how certain aspects of air transport should go without saying regardless of the cost of the ticket - ie the 'transport' itself.
Perhaps someone could tell me how these flights which redeliver incorrectly transported baggage to the intended destination without the owners on board are cleared to carry it ? Is the baggage subjected to extra checks and pressure chamber testing etc ?